" GKC, houses a shiva linga, in the main sanctum carved in good shastraic measures.........But the Shivalinga of Tanjore Vimana is disproportionate which is evident from a portion of the inside wall cit to insert the gomukhi spout of the pedestal around the shaft. from this, what is inferred is that there was no linga and peeta at all or linga along during Raja Raja period"
There is the locallegend referring to how the Lingam did not Stand on the pedestral and how it was fixed by Karuvurar Siddhar. May be that legend has some truth also...
"Secondly, it necessitated a change in the course of the praṇāḷa, the chute to drain the oblation discharge. In all other temples, the drain generally passes through the thickness of the wall, and the passage if there was one, in a straight line along the median axis. But, in this case, in order to avoid discharging the oblations right below the median openings, the drain was turned twice at right angles to the praṇāḷa located further east of the door. This design was not an ideal one, because the discharge of water or any other oblation liquid taking place from the sanctum was bound to be of high volume with a good proportion of solids and as such clog the drain."
I think this is a design fault, because the scale just plays hell with the traditional architecture!
We can see the route taken by the drain channel from the sanctum to the gomukhi. straight out of the north cardinal opening of the inner chamber, two right angles, and comes out east of the outer north opening...
http://www.poetryinstone.in “*Here the language of stone surpasses the language of man*” – Nobel laureate, Rabindranath Tagore